Chelsea part number 272KKJKX-15RK or 272KKJKX15RK is a 272 Series hot-shift power take-off assembly with 6-bolt mounting. The 272 Series consolidates several earlier medium-duty Chelsea PTO lines into a single platform rated for continuous torque up to 300 lb-ft (407 Nm), with intermittent torque in the 201-300 lb-ft (401-500 Nm) range. This unit runs a 1-1/4" round output shaft with a 5/16" key and supports both pneumatic (air) and PowerShift (pneumatic/hydraulic) engagement. Output power reaches 56+ HP (41-50 kW); shaft power at 1,000 RPM is rated at 57 HP (43 kW). Compatible transmission families include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM applications. Call us to confirm proper fit for your specific transmission and application.
Features
6-bolt mounting for broad transmission compatibility across Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms
Pneumatic (air) shift and PowerShift (pneumatic/hydraulic) shift options supported
1-1/4" round output shaft with 5/16" key
Continuous torque rating up to 300 lb-ft (407 Nm); intermittent torque 201-300 lb-ft (401-500 Nm)
Shaft power output: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
Series-level Smart Start option available for high-torque start-up conditions
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: Up to 300 lb-ft (407 Nm) - check application pages for actual torque ratings
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Output Power: 56+ HP (41-50 kW)
- Shift Type: Pneumatic (Air Shift); PowerShift (Pneumatic/Hydraulic)
- Shaft Power at 500 RPM: 29 HP (21 kW)
- Shaft Power at 1,000 RPM: 57 HP (43 kW)
- Compatible Transmission Manufacturers: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, Other
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 medium-duty PTO lines into a single platform. The series offers nine speed ratios and eighteen shift options. Direct-mount configurations include an optional Wet-Spline design for extended PTO and pump shaft service life. Driveshaft output configurations include the Smart Start option, engineered for high-torque engagement conditions. The integral air control valve is included. Typical application markets for the 272 Series include aerial lifts, towing and recovery, construction equipment, and water trucks.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
